Citadel Securities to close Apogee 'dark pool' -sources
March 27, 2015 at 12:31 PM EDT
NEW YORK, March 27 (Reuters) - Citadel Securities, a top market maker in U.S. stocks and listed options, plans to shutter its Apogee "dark pool" to focus on another of its off-exchange stock trading venues called Citadel Connect, according to people with direct knowledge of the matter.